`{:("Lanthanoids","Actinoids"),("1. Electronic configuration "[Xe]4f^(1-14)5d^(0-1)","6s^(2),"1.Electronic configuration "[Rn]5f^(1-14)6d^(0-1)","7s^(2)),("2. Differentiating electron enters the 4f subshell.","2. Differentiating electron enters the 5f subshell."),("3. Except Promethium all other elements occur in nature.","3. Except Uranium and Thorium, all others are synthesized in the laboratory."),("4. Binding energy of 4f electrons is higher.","4. 5f-orbitals have lower binding energy."),("5. Only Promethium is ratio active.","5. All elements are radioactive."),("6. Besides 3+ oxidation state they slow 2+ and 4+ oxidation states.","6. Besides 3+ oxidation state they shoe 2+, 4+, 5+, 6+, 7+ oxidation states."),("7. They have a less tendency to form complexes.","7. they have greater tendency to from complexes." ),("8. The colour of the lanthanoids ions is not as deep and sharp as actinoids.","8. Colour of actinoids is deep, e.g." U^(3+) "is red and" U^(4+) "is green."),("9. Lanthanoids cannot from oxocations.","9. Actinoids from oxocations such as"-UO_(2)^(" "2+)"," PuO_(2)^(" "+)"," UO_(2)^(" "2+)"," PuO_(2)^(" "2+).),("10. Lanthanoid hydroxides are less basic.","10. Actinoid hydroxides are more basic."),("11. Lanthanoid contraction is relatively less.","11. Actinoid contraction from element to element is comparatively more."),("12. Mutual shielding of 4f electrons is more.","12. Mutual shielding effect of 5f electrons is less."):}`
